Prepare the Pudding: In a large mixing bowl, combine the white chocolate pudding mix and cold milk. Beat according to the package directions until the pudding begins to thicken. Add the neon green gel food coloring along with 1–2 drops of green food coloring, then continue mixing until the pudding is smooth, vibrant, and forms soft peaks. Adjust the color slightly if needed to achieve the perfect Grinch-green shade.
Fill the Crust: Spoon the green pudding mixture into the Oreo pie crust. Spread it evenly across the crust using a spatula, smoothing the top for a clean, even layer.
Chill: Place the pie in the refrigerator and chill for at least 3 hours. This allows the pudding to fully set and makes slicing easier later.
Decorating and Serving
Add the Whipped Topping: Once the pie is fully set, remove it from the refrigerator. Gently spread the Cool Whip over the top in an even layer, creating soft swirls if desired for a festive look.
Decorate: Sprinkle the green sanding sugar evenly over the whipped topping, followed by the mini red heart sprinkles. These add sparkle and give the pie its signature Grinch-inspired design.
Finish Before Serving: Slice the pie, and just before serving each piece, place a single large red heart sprinkle on top. This final touch represents the Grinch’s growing heart and makes each slice extra special.
Serve: Serve chilled and enjoy this fun, creamy holiday dessert straight from the fridge.
